/*
 *
 *  Copyright 2016 Netflix, Inc.
 *
 *     Licensed under the Apache License, Version 2.0 (the "License");
 *     you may not use this file except in compliance with the License.
 *     You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 *     Unless required by applicable law or agreed to in writing, software
 *     distributed under the License is distributed on an "AS IS" BASIS,
 *     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *     See the License for the specific language governing permissions and
 *     limitations under the License.
 *
 */
package com.netflix.metacat.common.type;

import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableList;
import lombok.EqualsAndHashCode;
import lombok.Getter;

import java.util.List;

/**
 * Map type class.
 *
 * @author zhenl
 */
@Getter
@EqualsAndHashCode(callSuper = true)
public class MapType extends AbstractType implements ParametricType {
    /**
     * default.
     */
    public static final MapType MAP = new MapType(BaseType.UNKNOWN, BaseType.UNKNOWN);

    private final Type keyType;
    private final Type valueType;

    /**
     * Constructor.
     *
     * @param keyType   keytype
     * @param valueType valuetype
     */
    public MapType(final Type keyType, final Type valueType) {
        super(TypeUtils.parameterizedTypeSignature(TypeEnum.MAP,
            keyType.getTypeSignature(), valueType.getTypeSignature()));
        this.keyType = keyType;
        this.valueType = valueType;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public String getDisplayName() {
        return "map<" + keyType.getDisplayName()
            + ", " + valueType.getDisplayName() + ">";
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public List<Type> getParameters() {
        return ImmutableList.of(getKeyType(), getValueType());
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public TypeEnum getBaseType() {
        return TypeEnum.MAP;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public Type createType(final List<Type> types, final List<Object> literals) {
        Preconditions.checkArgument(types.size() == 2, "Expected two types");
        Preconditions.checkArgument(literals.isEmpty(), "Unexpected literals: %s", literals);
        return new MapType(types.get(0), types.get(1));
    }
}
